Analytical ChemistryHard
Question
A metal nitrate reacts with KI solution to give yellow precipitate which on addition of excess of more concentrated solution (6 M) of KI dissolves forming a solution. The cation of metal nitrate is :
Options
A.Hg22+
B.Ag+
C.Pb2+
D.Cu2+
Solution
Pb2+ + I2 → Pb I2 ↓(yellow)
Pb I2 + 2 I- ⇋ [Pb I4]2- (soluble complex)
Pb I2 + 2 I- ⇋ [Pb I4]2- (soluble complex)
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